|Title of Invention
A PROCESS FOR PREPARING A LUBRICATING BASE OIL
||The present invention relates to a process to prepare a lubricating base oil having a saturates content of more than 90% weight, a sulphur content of less than 0.03 % weight and a viscosity index of between 80-120 starting from.a lubricating base oil product having a saturates content of below 90% weight and a sulphur content of between 300 ppmw and 2% weight, which base oil product is obtained by first removing part of the aromatic compounds from a petroleum fraction boiling in the lubricating oil range by means of solvent extraction resulting in a solvent extracted product and subsequel1tly solvent dewaxing the solvent extracted product to obtain the lubricating base oil product, wherein the following steps are performed, a) contacting the lubricating base oil product with a suitable sulphided hydrotreating catalyst in the presence of hydrogen in a first hydrotreating step at a temperature of between 250 and 350°C and at a pressure of between 20 and 100 bar; b) separating the effluent of step a) into a gaseous fraction and a liquid fraction, wherein the liquid fraction has a sulphur content of between 50 and 1000 ppmw and a nitrogen content of less than 50 ppmw; c) , contacting the liquid fraction of step (b) with a catalyst comprising platinum and palladium and an amorphous silica/alumina support, wherein the total amount of platinum and palladium is between 0.2 and 5% weight in the presence of hydrogen in a second hydrotreating step wherein the pressure in step (c) is between 20 and 100 bar; and (d) recovering the lubricating base oil having the specified properties.
in-pct-2001-1655-che correspondence others.pdf
in-pct-2001-1655-che correspondence po.pdf
in-pct-2001-1655-che description complete.pdf
in-pct-2001-1655-che power of attoney.pdf